From c25589e77252829edb1bdf84435155f4542c3e07 Mon Sep 17 00:00:00 2001
From: codefiles <11915375+codefiles@users.noreply.github.com>
Date: Mon, 27 Jul 2026 08:07:28 -0400
Subject: [PATCH] Support AArch64 root partition type GUID (#4671)

---
 archinstall/lib/disk/device_handler.py | 16 +++++++++++++---
 archinstall/lib/disk/utils.py          |  9 ++++++++-
 archinstall/lib/models/device.py       |  4 +++-
 3 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/archinstall/lib/disk/device_handler.py b/archinstall/lib/disk/device_handler.py
index 360cbfd1..bb8636e4 100644
--- a/archinstall/lib/disk/device_handler.py
+++ b/archinstall/lib/disk/device_handler.py
@@ -1,5 +1,6 @@
 import logging
 import os
+import platform
 from pathlib import Path
 
 from parted import Device, Disk, DiskException, FileSystem, Geometry, IOException, Partition, PartitionException, freshDisk, getAllDevices, getDevice, newDisk
@@ -10,6 +11,7 @@ from archinstall.lib.disk.utils import (
 	find_lsblk_info,
 	get_all_lsblk_info,
 	get_lsblk_info,
+	linux_root_guid,
 	mount,
 	udev_sync,
 	umount,
@@ -26,7 +28,6 @@ from archinstall.lib.models.device import (
 	LsblkInfo,
 	ModificationStatus,
 	PartitionFlag,
-	PartitionGUID,
 	PartitionModification,
 	PartitionTable,
 	SubvolumeModification,
@@ -339,6 +340,7 @@ class DeviceHandler:
 		block_device: BDevice,
 		disk: Disk,
 		requires_delete: bool,
+		arch: str | None = None,
 	) -> None:
 		# when we require a delete and the partition to be (re)created
 		# already exists then we have to delete it first
@@ -394,7 +396,7 @@ class DeviceHandler:
 
 		if disk.type == PartitionTable.GPT.value:
 			if part_mod.is_root():
-				partition.type_uuid = PartitionGUID.LINUX_ROOT_X86_64.bytes
+				partition.type_uuid = linux_root_guid(arch).bytes
 			elif PartitionFlag.LINUX_HOME not in part_mod.flags and part_mod.is_home():
 				partition.setFlag(PartitionFlag.LINUX_HOME.flag_id)
 
@@ -536,11 +538,19 @@ class DeviceHandler:
 		# don't touch existing partitions
 		filtered_part = [p for p in modification.partitions if not p.exists()]
 
+		arch = platform.machine()
+
 		for part_mod in filtered_part:
 			# if the entire disk got nuked then we don't have to delete
 			# any existing partitions anymore because they're all gone already
 			requires_delete = modification.wipe is False
-			self._setup_partition(part_mod, modification.device, disk, requires_delete=requires_delete)
+			self._setup_partition(
+				part_mod,
+				modification.device,
+				disk,
+				requires_delete=requires_delete,
+				arch=arch,
+			)
 
 		disk.commit()
 
diff --git a/archinstall/lib/disk/utils.py b/archinstall/lib/disk/utils.py
index 5829164a..30bdfb93 100644
--- a/archinstall/lib/disk/utils.py
+++ b/archinstall/lib/disk/utils.py
@@ -6,7 +6,7 @@ from pydantic import BaseModel
 from archinstall.lib.command import SysCommand, run
 from archinstall.lib.exceptions import DiskError, SysCallError
 from archinstall.lib.log import debug, info, warn
-from archinstall.lib.models.device import LsblkInfo
+from archinstall.lib.models.device import LsblkInfo, PartitionGUID
 
 
 class LsblkOutput(BaseModel):
@@ -196,3 +196,10 @@ def swapon(path: Path) -> None:
 		SysCommand(['swapon', str(path)])
 	except SysCallError as err:
 		raise DiskError(f'Could not enable swap {path}:\n{err.message}')
+
+
+def linux_root_guid(arch: str | None) -> PartitionGUID:
+	if arch == 'aarch64':
+		return PartitionGUID.LINUX_ROOT_AARCH64
+
+	return PartitionGUID.LINUX_ROOT_X86_64
diff --git a/archinstall/lib/models/device.py b/archinstall/lib/models/device.py
index 72a8fa27..20559d70 100644
--- a/archinstall/lib/models/device.py
+++ b/archinstall/lib/models/device.py
@@ -805,9 +805,11 @@ class PartitionFlag(PartitionFlagDataMixin, Enum):
 
 class PartitionGUID(Enum):
 	"""
-	A list of Partition type GUIDs (lsblk -o+PARTTYPE) can be found here: https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
+	A list of Partition type GUIDs (lsblk -o+PARTTYPE) can be found here:
+	https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
 	"""
 
+	LINUX_ROOT_AARCH64 = 'B921B045-1DF0-41C3-AF44-4C6F280D3FAE'
 	LINUX_ROOT_X86_64 = '4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709'
 
 	@property